Flyer

ABSTRACT

A flyer has a unitary frame that is cast of a light alloy metal and includes a pair of legs joined at their upper ends by a connecting and supporting arch and a lower annular member to which the legs are securely joined at their lower extremities to form a closed loop. The frame also includes at least one rigid tubular member in the arch that extends downwardly through the legs and is embedded in the lower member. A press-finger is mounted on one of the legs with the tubular member of that leg being a guiding tube for the sliver.

United. States Patent [1 1 Schwager Appl. No.: 205,818

[ Jan. 1, 1974 FLYER 3.474.614 10/1969 Gollina 57/117 [76] Inventor: l-lans-Jiirg Schwager, Chemin de la OTHER PUBLICATIONS ggfjgzg Lausanne Saco-Lowell Rovematic publication; 7-1966.

221 Filed: Dec. s, 1971 Primary ExaminerJohn Petrakes Att0rney-Granville M. Brumbaugh et al.

[ 5 7] ABSTRACT A flyer has a unitary frame that is cast of a light alloy metal and includes a pair of legs joined at their upper ends by a connecting and supporting arch and a lower annular member to which the legs are securely joined at their lower extremities to form a closed loop. The frame also includes at least one rigid tubular member in the arch that extends downwardly through the legs and is embedded in the lower member. A press-finger is mounted on one of the legs with the tubular member of that leg being a guiding tube for the sliver.

3 Claims, 3 Drawing Figures In |l m FLYER BACKGROUND OF THE INVENTION Flyers which consist of several components and are closed upon themselves are already known. However, such flyers have to be made of specially tough-hard and expensive material to reduce bending and the risk of breaking.

Such compound frame-type flyers further have the great drawback that they are only reasonably stable in the form of a frame, but are not distortion-proof, so that if a leg gets broken by impact, for instance, the high centrifugal force causes them to break asunder at the joints. Moreover, these known flyers are expensive to manufacture and, being prone to damage, are there fore uneconomical in use.

SUMMARY OF THE INVENTION BRIEF DESCRIPTION OF THE DRAWING An embodiment of the present invention is now to be described by way of example with reference to the accompanying drawing, in which:

FIG. 1 shows, partly in section, a flyer as viewed from the broad side;

FIG. 2 shows the flyer according to FIG. 1 turned through 90; and

FIG. 3 shows a section through a long leg along line Ill-III of FIG. 1 on a larger scale, with the press-finger bearing also shown.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The flyer shown in FIGS. 1 and 2 comprises a flyer frame 1 consisting of a single piece closed upon itself in the form of a loop by having two legs 3 and 5 which are interconnected at the upper end by a strong connecting arch 7, at the lower end by a distortion-proof annular connecting piece 8. The high strength of the connecting piece 8 is achieved in that the piece consists of a ring 8a, with a tubular neck 9 and an upper terminal flange 10. The upper end of the flyer is further provided with a balancing disk 12 to which, as also to the lower connecting piece 8, balance correction pieces 15 can be attached.

Pivoted to one of the legs 3 by means of bearing 24 is a press-finger 14, with a press-finger counterweight 26 forming the connection between the two bearings and the actual press-finger 14.

The flyer presents a rotational axis 16. The flyer frame includes a guide tube 18 and a reinforcement tube 20 of steel or some other metal that is cast integrally with the frame within the legs 3 and 5 respectively, the connecting arch 7 and the lower connecting piece 8. An upper bearing pin 22, also cast integrally with the frame and made of steel, forms the upper flyer bearing. The flyer is driven and supported at the lower connecting piece 8 by a driver (not shown).

The guide tube 18, made of steel or some other metal, guides the sliver (not shown), which issues through a bore 13 at the level of the press-finger. The two tubes 18 and 20 form reinforcements for the outer flyer portion, made of cast light alloy. These tubes are concurrently intended to permit a lighter casting of high strength to be made. This reinforced frame construction gives the flyer very high stability, strength and breaking resistance. As the legs of this flyer, unlike the conventional type, are held together below, the expansion due to the centrifugal force can be reduced despite the double flyer height necessary. When the flyer, running at 1,200 1,800 rpm, for instance, is accidentally hit by an external object and thus may have one or both of its legs broken, the self-supporting upper and lower portions as well as the reinforcement prevent the legs from breaking asunder, so that they cannot damage the neighbouring flyers or endanger the operating personnel. With its favourable design, the flyer described can be cast of a piece from commercial light-alloys, and this not only reduces the manufacturing cost below that of known flyer types, but also ensures a higher distortion resistance.

The result is a unit of very high strength which, even in the event of a leg breaking, still presents the strength relations such as prevail in the open-ended flyer type, so that the risk'of disruption is considerably reduced, especially because of the additional reinforcement at the top and bottom connections, as compared with the conventional type. Moreover, owing to manufacture by casting, the press-finger can be made in such a way that its centrifugal force acts not on the middle of the leg, but rather on the upper and lower ends of the pressfinger bar, so that in this respect again the leg is exposed to a lower fatigue load and stress than is the case in the known flyers of the closed-ended type.

Also, the outer contours of this flyer can be given a favourable aerodynamic design.

The casting process also permits the favourable press-finger bearing shown to be made in the space inside the streamlined casing 11, with the two bearing supports 24 extending through two openings in the said casing. This type of press-finger bearing permits the press-finger counterweight 26 to be arranged in the lee of the leg, without any adverse effect on the pressfinger pressure conditions between initial and end positions. Compared with the known versions, this arrangement not only saves space, but also provides better equilibrium conditions in the extreme press-finger positions and prevents undesirable aerodynamic effects from neighbouring flyers on the press-finger pressure.

I claim:

1. A flyer comprising:

a unitary frame cast from light alloy metal and having two legs having upper and lower ends, a unitary cast upper connecting supporting arch and a lower annular member for securely joining said legs at their upper and lower extremities, respectively, to form a closed loop, the frame further having at least one rigid tubular member inside the arch and extending downwardly through the entire length of both legs and being embedded in said lower annular member at the lower extremities of said legs to rigidly support the legs:

a press-finger on one of the legs, the tubular member of said one leg being a guide tube for slivers, the connecting arch including a sliver entrance bore to said one leg tubular member and said one leg including a sliver exit bore from the tubular member to the press-finger; and means for mounting the press-finger on said one leg. 2. A flyer according to claim 1 wherein said lower annular member comprises a lower ring, a tubular neck and an upper terminal flange, an outer extremity of diametrically opposed edges of said ring and said flange being joined to said legs and at least one tubular member for providing support to said frame legs.

3. A flyer according to claim 1 wherein each frame leg includes an outwardly extending projection for streamlining of the respective legs, and wherein:

press-finger. 

1. A flyer comprising: a unitary frame cast from light alloy metal and having two legs having upper and lower ends, a unitary cast upper connecting supporting arch and a lower annular member for securely joining said legs at their upper and lower extremities, respectively, to form a closed loop, the frame further having at least one rigid tubular member inside the arch and extending downwardly through the entire length of both legs and being embedded in said lower annular member at the lower extremities of said legs to rigidly support the legs: a press-finger on one of the legs, the tubular member of said one leg being a guide tube for slivers, the connecting arch including a sliver entrance bore to said one leg tubular member and said one leg including a sliver exit bore from the tubular member to the press-finger; and means for mounting the press-finger on said one leg.
 2. A flyer according to claim 1 wherein said lower annular member comprises a lower ring, a tubular neck and an upper terminal flange, an outer extremity of diametrically opposed edges of said ring and said flange being joined to said legs and at least one tubular member for providing support to said frame legs.
 3. A flyer according to claim 1 wherein each frame leg includes an outwardly extending projection for streamlining of the respective legs, and wherein: said press-finger includes a counterweight extending above and below said press-finger and parallel to said one leg projection along a portion thereof; and said mounting means includes openings in said one leg projection opposite the upper and lower extremities of said counterweight and further includes means at said upper and lower extremities of said counterweight for attaching said counterweight to said one leg through said projection openings to prevent centrifugal force from said press-finger from acting on said one leg at said press-finger. 